Energy-loss straggling of swift heavy ions in an electron gas

Energy straggling of heavy ions in thin foils

2014 The energy straggling of heavy ion beams at tandem energies, passing through thin foils, has been studied with ions of mass up to A = 35. Charge exchange in the foils has been found to have a considerable effect on the energy spread. Thickness non-uniformities in the foils can also make significant contributions. Extrapolation of the observations to the case of a uniform carbon stripper fo...

Impact of Extended Charge Distribution on Energy-Loss Straggling of Heavy Ions

The energy-loss straggling of partially ionized heavy ions is determined by the stochastic fluctuations of the energy loss in atomic collisions remaining in a fixed charge state, (collisional straggling) and by the influence of charge-state fluctuations (charge-exchange straggling) [1, 2]. Besides the charge-changing cross sections the charge-exchange straggling depends critically on the differ...

A New Electron Energy-loss Straggling Algorithm in Mcnp

A new algorithm for energy-loss straggling in MCNP is demonstrated. An approximate but accurate energy-loss moment-preserving differential cross section is used in conjunction with single event Monte Carlo simulation through each condensed history step to show that highly accurate energy spectra, leakage currents, and dose profiles can be obtained. This new approach provides a viable and even p...

Energy-loss straggling of 2–10 MeV/u Kr ions in gases

Christof Vockenhuber, Jens Jensen, Jaakko Julin, Heikki Kettunen, Mikko Laitinen, Mikko Rossi, Timo Sajavaara, Orkhan Osmani, Andreas Schinner, Peter Sigmund and Harry J Whitlow, Energy-loss straggling of 2–10 MeV/u Kr ions in gases, 2013, European Physical Journal D: Atomic, Molecular and Optical Physics, (67), 7. http://dx.doi.org/10.1140/epjd/e2013-40095-4 Copyright: EDP Sciences: EPJ http:/...

Convolution approximation for the energy loss, ionization probability and straggling of fast ions